Foursquare users can unlock this rare Swarm badge, by being one of 50 or more users to check into the same establishment at the same time. It should come as no surprise that a conference such as South by Southwest would be the perfect storm for such an occasion. Accomplishing this task outside of Austin’s SXSW conference, however, is far less likely. Steffan Antonas found one social media savvy business owner who took advantage of Foursquare’s appeal to drive swarms of people into his establishment.